The text on the card reads, "Geo. E. Mansfield, 24 Washington Street, Boston. Economic Railways, Mansfield System". It would appear to date from his post-B&SR work as a private railroad consultant, maybe late 1880s.

I was the only bidder, which surprised me. (Needless to say I think it's worth more than $4.99.) My plan is eventually to donate it to the museum.

The museum is bidding on the aforementioned slide. Please do not outbid us.

I have also learned that our archivist has not been monitoring this thread, and was not aware of this slide (or the ones previously sold.) Linc Reed-Nickerson is now handling our ebay activities - please coordinate directly with him at ebaysales@wwfry.org if you see an item that we should have in our collection. Thanks!